50 CORYNID.E. 



condition, its shape is altered, the tentacles are wanting, 

 and the generative products are matured while it is at- 

 tached to the zoophyte. In such cases the polypites 

 also are often atrophied. One or two species have been 

 founded on this merely seasonal phase. 



The species of Syncoryne are for the most part littoral, 

 and seem to be very indifferent to the quality of the water 

 in which they live. S. gravata, according to Agassiz, is 

 found either in pure sea-water or at the mouths of rivers ; 

 and Loveii states that S. Sarsii occurs even in stagnant 

 water. 



1. S. EXIMIA, Allman. 



CORYNE EXIMIA, Allman, Ann. N. H. for August 1859. 



LISTERII, Alder, North. Cat. in Trans. Tynes. Club, iii. 102. 

 SYNCORYNE EXIMIA, Allman, Ann. N. H. for May 1864. 



Plate IX. fig. 2. 



ZOOPHYTE forming large entangled masses, much and ir- 

 regularly branched ; MAIN STEMS smooth, except towards 

 the base ; BRANCHES generally ringed above their origin, 

 bearing polypiferous ramuli, which are mostly unilateral 

 and annulated throughout ; POLYPITES rather small, with 

 a membranous cup round the base ; tentacles from 20 

 to 30, scattered over the body, with the exception of 

 the first 4, which are disposed in a verticil behind 

 the mouth; GONOPHORES pedunculate, springing from 

 the bases of the tentacles over the greater part of t/te 

 body. 



UMBRELLA of the free zooid (at the time of liberation) 

 deeply bell-shaped, studded with thread-cells of large 

 size (about - 06" in transverse and a little more in ver- 

 tical diameter), with a wide velum; MANUBHIUM reddish, 

 extending to about the middle of the umbrella; MAR- 

 GINAL TENTACLES very extensile, springing from large 



